A5032481686- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Multidisciplinary Science and Engineering Research
- Geophysics and Gravity Measurements
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Planetary Science and Exploration
- Magnetic and Electromagnetic Effects
- Nuclear Materials and Properties
- COVID-19 epidemiological studies
- Experimental and Theoretical Physics Studies
- Radioactivity and Radon Measurements
- Scientific Research and Discoveries
Universidad de Guanajuato
2015-2024
Universidad de León
2017
University of California, Riverside
2015
Ain Shams University
2013
Zewail City of Science and Technology
2013
University of Maryland, College Park
2012
Center for Research and Advanced Studies of the National Polytechnic Institute
2011
British University in Egypt
2011
Industrial University of Santander
2011
Instituto Superior Técnico
2002-2003
Lepton number violation can be induced by Majorana neutrinos in four-body decays of the neutral $B$ meson and top quark. We study effects these $|\ensuremath{\Delta}L|=2$ a scenario where single heavy neutrino enhance amplitude via resonant mechanism. Using current bounds on mixings, most optimistic branching ratios turn out to at level ${10}^{\ensuremath{-}6}$ for ${\overline{B}}^{0}\ensuremath{\rightarrow}{D}^{+}{e}^{\ensuremath{-}}{e}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$...
If dark matter is mainly composed of axions, the density distribution can be nonuniformly distributed, being clumpy instead. By solving Einstein-Klein-Gordon system a scalar field with potential energy an axionlike particle, we obtain maximum mass self-gravitating made called axion stars. The collision stars neutron may release axions due to conversion into photons in presence star's magnetic field. We estimate and show that it should much less than previous estimates.Future data from...
We analyse the top flavour violating decays in general supersymmetric model using mass insertion approximation. In particular, we discuss impact of a light right-handed top-squark and large mixing between first or second third generation up-squarks on processes as t -> q gamma,g . also take into account relevant experimental constraints from B-physics requirements for successfull electroweak baryogenesis squark mixings. show that mixings squarks matrix, branching ratio gamma, g (q=u,c) can...
In TeV scale B−L extension of the standard model with inverse seesaw, Yukawa coupling right-handed neutrinos can be order one. This implies that out-of-equilibrium condition for leptogenesis within cosmology is not satisfied. We provide two scenarios overcoming this problem and generating desired value baryon asymmetry Universe. The first scenario based on extra-dimensional braneworld effects modify Friedman equation. show in case Universe constrains five-dimensional Planck mass to 100 TeV....
We compute the supersymmetry (SUSY) effective Hamiltonian that describes $|\ensuremath{\Delta}S|=1$ semileptonic decays of tau leptons. provide analytical expressions for supersymmetric contribution to $\ensuremath{\tau}\ensuremath{\rightarrow}u\overline{s}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ transition in mass insertion approximation. show SUSY contributions may enhance $CP$ asymmetry $\ensuremath{\tau}\ensuremath{\rightarrow}K\ensuremath{\pi}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ by...
We analyze the different parametrizations of a general four-zero texture mass matrix for quarks and leptons that are able to reproduce Cabibbo-Kobayashi-Maskawa Pontecorvo-Maki-Nakagawa-Sakata mixing matrices. This study is done through an ${\ensuremath{\chi}}^{2}$ analysis. In quark sector, only four solutions found be compatible with matrix. leptonic using last experimental results about angles in neutrino our analysis shows preferred value ${m}_{{\ensuremath{\nu}}_{3}}$ around 0.05 eV,...
In this paper, we study the Cabibbo favored nonleptonic ${D}^{0}$ decays into ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decays. First show that, within Standard Model (SM), corresponding charge conjugation and parity ($CP$) asymmetry is strongly suppressed out of experimental range, even taking account large strong phases coming from final state interactions. We also that although new physics models with extra sequential generation can enhance $CP$ by a few orders magnitude, resulting...
Latest Lattice results on $D$ form factors evaluation from first principles show that the standard model (SM) branching ratios prediction for leptonic $D_s \to \ell \nu_\ell$ decays and semileptonic SM of $D^0$ $D^+$ meson are in good agreement with world average experimental measurements. It is possible to disprove New Physics hypothesis or find bounds over several models beyond SM. Using observed D decays, we performed a combined analysis constrain non interactions which mediate...
We propose a new strategy for detecting the CP-violating phases and effective mass of muon Majorana neutrinos by measuring observables associated with neutrino–antineutrino oscillations in π± decays. Within generic framework quantum field theory, we compute non-factorizable probability producing pair same-charged muons decays as distinctive signature νμ−νμ¯ oscillations. show that an intense neutrino beam through long baseline experiment is favored probing phases. Using oscillation reported...
The CP asymmetry in neutrino oscillations, assuming new physics at production and/or detection processes, is analyzed. We compute this using the standard quantum field theory within a general scenario that may generate sources of and flavor violation. Well known results for are reproduced case V -A operators, additional contributions from operators derived. apply formalism to SUSY extensions Standard Model where could produce observable next generation experiments.
Based on the description of unstable ${K}_{L,S}$ particles in quantum field theory (QFT), we compute time-dependent probabilities for transitions between asymptotic states ${\ensuremath{\tau}}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}[{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{]}_{K}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\nu}$ decays, where pair $[{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{]}_{K}$ is product (intermediate...
The leading order contribution to the direct CP asymmetry in tau^{+/-} -> K^{+/-} pi^0 nu_{tau} decay rates is evaluated within Standard Model. weak phase required for violation introduced through an interesting mechanism involving second interactions, which also responsible tiny violations of Delta S= Q rule K_{l3} decays. calculated turns out be 10^{-12}, leaving a large window studying effects non-standard sources this observable.
In this paper we study the direct $CP$ asymmetry of doubly Cabibbo-suppressed decay mode ${D}^{0}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ within standard model and two Higgs doublet with generic Yukawa structure. derive corrections to tree level amplitude, generated from box dipenguin diagrams, required for generating weak violating phases. We show that these phases are so tiny leading a order ${10}^{\ensuremath{-}9}$. Regarding structure Wilson coefficients...
We propose a hybrid inflation model with complex waterfall field which contains an interaction term that breaks the U(1) global symmetry associated charge. show asymmetric evolution of real and imaginary parts during phase transition at end translates into charge asymmetry. The latter strongly depends on vacuum expectation value field, is well constrained by diverse cosmological observations.